Adding 'isolates' argument to LOG to get rid of multiple TLS fetches in profiling.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index 0719d42dc9fab35b041cc069498ccc5bc9ab5ba9..13da92b240337bc113b79a45a794596fd4e09b75 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -169,7 +169,7 @@ void* OS::Allocate(const size_t requested,
   void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANON, -1, 0);
 
   if (mbase == MAP_FAILED) {
-    LOG(StringEvent("OS::Allocate", "mmap failed"));
+    LOG(ISOLATE,StringEvent("OS::Allocate", "mmap failed"));
     return NULL;
   }
   *allocated = msize;